I run an autometer mech gauge on the ATI steering column pod gauge. Cheap and efficient vs the P3 gauge wich is so expensive. I also was looking at different setup but really wanted a mech gauge instead of an electric one.

Boost gauge is just for show. I prefer the clean OEM look, as opposed to the racer-mentality boost gauge. I feel like a boost gauge in a stock turbo'd 3 series is trying too hard. Diff strokes for diff folks?